Leakproof tube seal



H. S. DARLlNG'n-ON LEAKPROOF TUBE SEAL Filed Feb. 25 1922 Patented Aug. 26, 1924.

Unirse ,STATES Moens rATENr ersten HENRY SAULNIER DARLINGTON, OF MEDIA, PENNSYLVANIA, ASSIGNOR TO A. H. W'IRZ, INC., 0F CHESTER, PENNSYLVANIA, A CORPORATION O'F PENNSYLVANIA.

LEAKPROOF TUBE SEAL.

Application led February 25, 1922. Serial No. 539,1619.

To all 'whom 'it may concern.'

Be it known that I, HENRY SAULNrEn DARLINGTON, a citizen of the 'United States, residing at Media, in the county of Delaware and State of Pennsylvania, have invented a certain new and useful Leakproof rllube Seal, of which the following is a speeication.

My invention relates to the seals or closures used upon or for collapsible tubes extruded from tin, lead, aluminum and other metals.

The purpose of my invention is to seal a tube by the pressure of a plug against side walls of an apertured. cork.

A further purposel is to carry the cork of a cork-and-plug seal within the tube and to ,support the cork therein against displacement.

A further purpose is to provide a compartment within the end of a tube and to secure an annular cork within the compartment. l

A further purpose is to simplify the sealing operation. f

A further purpose is to form a tube with a cylindrical compartment open at one end I adjoining the intended outlet, to place a cork within the compartment and to seal the cork therein by closing a wal-l of the compartment against the cork. I claim both the article andthe processes involved. 0

Further purposes will appear 1n the specification and in the claims.

I have preferred to illustrate my invention by but one general form, shown in slightly different embodiments, selecting a form which in use has proved to be practical, eic'ient, inexpensive and very reliable, and which at the same time well illustrates the principles-of my invention.V

Figure 1 is a broken elevation partly in longitudinal section, showing my preferred form of completed tube closure. j

Figure 2 is a corresponding view showing an intermediate condition of manufacture, with mandrels in place for the fastening of the cork.

Figures 3 and 4 are sections of Figures 1 and 2 upon lines 3-3 and Jr-4 respectively.

Figure 5 is a section corresponding to Figure 1 showing a completed closure of modified form.

Figure 6 is a view corresponding generallyy t0 'Figure 2 but of the structure of Fig- 55 urel 5.

Figures 7 and 10 are side elevations of two different forms of retaining devices for the plug of the closure.

Figure is a top plan view of the structure Aseen 1n Figure 7.

Figure 9 is a section taken upon line 9-9 of Figure 10.

In the drawings similarr numerals indicate like parts.

In the manufacture of collapsible tubes from any suitable material, various forms of closure have been proposed. Where the content is a paste, the ordinary plug affords sufcient protection. Where the content is a liquid or semi-liquid, the closure which probably has come .nearest to alfording an effective seal uses a screw cap in conjunction with a cork insert bearing against the outer face of the nozzle about the outlet.- This is open to serious objections, among which are the defects of the cork. rlhese defects become of exaggerated importance because ef the necessarily thin character of the insert provided.

I have aimed to overcome these objections by using a plug closure in conjunction with an annular seal of cushion material about the plug, which cushion material I refer to generically herein as cork. I secure sliding 85 movement of the plug with a quicker and easier sealing movement than that of screwing en the cap.

In the forms shown I have illustrated conventional tubes 5 having reduced tubular e0 and outlets 6, 6', 62, corresponding, except for my invention, with the outlets at present in use for paste-like products.

I provide an apertured cork carried by the tube, which is engaged by a plug closure. Though the cork could, of course, be held in place by cement lto come within my broad invention, I will proceed te describe the best means known to me for effecting this seal as required by the statute.

In the extrusion of the tube I provide not only the cylindrical extension before mentioned, forming a small chamber adjacent the outlet opening, but in my preferred embodiment I form the usual initially vclosed end 7, which when apertured may be regarded as presenting a radially-directed annular Harige 8; Though the outlet opening 59 flange 8 should be supportedom within,

9 may be provided for in the extrusion I prefer to cut it separately.

Within the tube I'also provide a cylin' drically extending flange 10 preferably in line with the walls of the outlet `6 and which is adapted to. be inwardly turned so as to hold a cork 11 between this flangel and the flange 8. The cork is apertured at 12.

Through the rear end of the tube I in# sert the cork. within the cylindricalv space provided and close the annular flange 10 about the Acork to retain the cork in posi'- tion and preferabl to place the'cork under compression. VI s ow a convenient means for effecting this, placing thecork fully within the space, or supporting it upon the end 13 of a mandrel 14.-, while the tube and mandrel are'rotated relatively to turn the annular flange 10 inwardlv about the end of the cork. In the form shown the cork is pushed to place and the mandrel is rotated while the stationary tube is' pushed toward it by the stationary die 15 so that the curved walls 16 of the .mandrel spin the ange inwardly to some such position as shown atv 17in Figure 1. The-cork is 'held firmly between the two flanges and the aperture of the corkis accessible through the opening'. i

The lplug 18 carried by 'cap19 forms'an effective seal against the interior walls of.

the lopening inthe cork. i

In the form shown in Figures 5 and 6 the same general character of closure and method of assembla e is shown,to retain the anges, vwith the differ-l cork between two ence, however, that the initial flange 8 lis formed withinv the tube. As the metal is extruded ,this flange is preferably closed completely and subsequentl. .apertured at 9', though the aperture cou d'be put in it during the extruslon shown.

The upper end 'of the cylindrical side piece 6 is extended at 6so that when the cork is .in place and resting upon the flan e 8 the projecting upper portionl 63v ma ge spun against the cork to hold the cor in -v ation.

' ing loss of the position and preferably to compress the cork. During this spinning. o eration the as by a die not shown. If desired a differ# ent Vcontour can be given the top either during the spinning or by subsequent die oper- In Figure 7, I vs'how'a'meansl for preventcap 19A is exten ed. at 20, ifnecessary to secure the diameter desired, and is apar-1in.

-tween the two lflanges. v gu1de.21 whichis downwardly turned at tured to receive a wire, cord, strip or other one Aend at 22, to prevent 'remova'lof the cap, andat the other e'nd is encircled Vat -23 about the u the-outlet.`

-to include herein yall such forms as come Atransverse to the passa .with the passa' the inner end t ereof. v A 4, The-process of forming an outlet .'for a collapsible tube which consists in forming` V an interior flange within -thefoutlet p`- and -vmaterial' for a second flange at a dlsr lug closure, in which ther part 'of the tube adjacente bead the turned l end against slipping the" mbe. Pref,

modus erably the guide is of spring material held abfint the tubev by the spring of the mater1a L A In Figures 9 'and '10 the retaining devices diiler from those of 7 and 8 in two particulars; in that the retainin member is flexible and in the manner of holding it to the tube. v

The retaining member'21 is shown as a loop or cord whose ends, preferably knotted, are secured to earor ears 25 integral with the tube. The easiest," neatest and. most convenient way to hold the end of the loop, which I have found, is by the formation of two ears which are pinched together about the knot to retain the loop. It will be evident that my disclosurewill. suggest -other forms of the invention to those skilledA inthe art, carryin out all or'8`5 a part of my invention, and di erin from mine according to theJ individuality or whim of the designer or the extent ofKhis desire to obtain the benefit of my invention without copying it; and it is my purpose within the reasonable spirit and scope of 'my invention.

I claim as new and desire 1. A Collapsible tube few-halting"liquidav land semi-liquids, having the outer end formed as a chamber,- an apertured cork in said chamber, under compression axially of the corkand'a plug fitting the laperture and closing the tube byengagement of the walls of the cork. i 2. As an intermediate article of manufacturera collapsible tube having a'fp/SSfge, a langesubstantially transverse to the-passage at. one end thereofand material "foraflange substantially parallel with the passage at the other end thereof. r 3. A collapsible tubefor holding liquids and semi-liquids, a tube having an outlet vapproximately straight passage, a` flangethereof anda 'flange su stantiall parallelv extending into t e tube at tance therefrom, placing an'a rtured cork within 'the outlet and against t e flange and turnixthematerial for the second-flange war y gainst the cork'to' retain it be 5. .'Iheprocess of forming an outlet for an interior a vwithin'. the. outlet assag`e at the outer Len of the 'passa an av secof .the passage, placingan'4 apertured its at the outer end a collapsible tube which consists in forming..

imam A t against the rst flange but .terminating sage adjacent the .inner end of the outlet passage, in placing in the outlet passage be- 10 yond the lange an apertured cork shorter 1n length than the length of the passage beyond the flange and in turning the end of the outlet passage inwardly toward the axis ofl the passage to confine the cork Ain the 15 passage.

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